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- Subject: RE: Functional objects
- From: "Bilyk, Alex" <ABilyk@...>
- Date: Wed, 22 Sep 2004 12:43:06 -0700
And still this would only apply to those 'objects' that don't have any attributes.
given a table 'object'
method = function () end,
attribute = 1
table_object.attribute = 2
table_object : method()
How can one convert this into a functional one? So, the proposed feature would only apply to objects that effectively are bags of functions with no data. Right? I think, practically, most objects people are dealing with have both methods and attributes. Given an function based object, can one use attributes with them?
function_object:method() --> function_object("method")
function_object.attribute --> ???
From: Rici Lake [mailto:firstname.lastname@example.org]
Sent: Wednesday, September 22, 2004 12:13 PM
To: Lua list
Subject: Re: Functional objects
On 22-Sep-04, at 2:06 PM, Bilyk, Alex wrote:
> With all it's limitations and peculiarities of [mis]use in some
> contexts I fail to see how Lua would benefit from this on one hand,
> while I also fail to see what is wrong with
> function_obj("msg", ... )
> to begin with. The above form, while marginally longer to type, is
> clear to anyone and works for any string.
Well, that was my first reaction, too. But when I started to think
about it, particularly when playing around with implementing objects as
coroutines, I realised that it is nice to be able to do:
without having to know whether obj is a traditional table-based object,
or a function-based object. (In other words, the implementation of obj
could change without having to change consumers of the object.) Of
course, you could write a wrapper for obj to make it work properly, but
Mark's idea seems like a nice way of getting around having to do that.
So (I presume) it would be specifically for that case, in which case it
is not really that limited or peculiar.